Processes of pore fluid substitutions or borehole fluid injections are typical for developments of hydrocarbon<br>or geothermic reservoirs. Microseismicity occurring during such borehole fluid injections or extractions has<br>a large potential in understanding of physics of the seismogenic process as well as in obtaining detailed<br>information about reservoirs at locations as far as several kilometers from boreholes. Here we introduce a<br>concept for interpretation of microseismic data which provides a possibility to infer an information about<br>hydraulic properties of rocks. Estimates of hydraulic diffusivity tensors on large spatial scales as well as<br>imaging of its distributions in space resulting from this concept can be of significant importance for industrial<br>applications and understanding of physical properties of geological structures.


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